Which of the following traits would you expect to be inherited as quantitative traits? a. body weight in chickens b. growth rate in sheep c. milk production in cattle d. fruit weight in tomatoes e. coat color in dogs

Question

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Answer 1

Textbook Question

Chapter 19, Problem 1P

Which of the following traits would you expect to be inherited as quantitative traits?

a. body weight in chickens

b. growth rate in sheep

c. milk production in cattle

d. fruit weight in tomatoes

e. coat color in dogs

Expert Solution & Answer

Summary Introduction

To analyze:

Determine the expected quantitative traits from the following:

Body weight in chicken

Growth rate in sheep

Milk production in cattle

Fruits weight in tomatoes

Coat color in dogs

Introduction:

Multifactorial traits are the results of genetic and non-genetic variation that can contribute to the variation in phenotypes of certain traits. These multifactorial traits can be classified as quantitative traits or qualitative traits. Qualitative phenotypic variations are discontinuous variation whereas quantitative phenotypic variations are continuous variation. The effect of multiple genes which exerts same or different amount of influence on the phenotypes leads to the continuous variation in the phenotypes of polygenic traits. The influence of multiple genes leads to a number of traits called polygenic traits. The incremental contributions by multiple genes result in continuous phenotypic variation. These multiple genes are called additive genes and their effects are called additive gene effects.

Explanation of Solution

The additive effects of multiple genes contribute to the body weight of the chicken. But chickens have different body mass which suggests that each gene contributes a certain quantity of body weight. This difference in body mass is responsible for continuous variation. Therefore, it is a quantitative trait.

Continuous variation is also seen in the growth rate of sheep. The additive effect of multiple genes is responsible for different growth rates. So, the growth rate in sheep is a quantitative trait.

The amount of milk produced by each cattle is varying continuously. This suggests that the phenotypic trait is controlled by a number of genes. Each gene may add a certain quantity of milk. Therefore, milk production in cattle is a quantitative trait.

Tomatoes are also have different weights. This difference in the weight of tomatoes is contributed by different genes. This suggests that continuous variation in weight difference is an additive gene effect. Therefore, fruit weight in tomatoes is a quantitative trait.

It is observed that the coat color of the dogs is not continuously varied. Contrast is present in the coat color of dogs. Therefore, coat color in dogs is not a quantitative trait.

Conclusion

The quantitative traits are classified based on continuous and discontinuous phenotypic variation.

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Heritability of a biological trait is best defined as which of the following? a. The proportion of variation in a trait that is specifically due to genes. b. The proportion of variation in a trait that is due to the environment and genes c. The proportion of variation in a trait that is only due to dominant additive genetic variance. d. The proportion of variation in a trait due to developmental effects.

A genetics researcher determines that the broad-sense heritability of height among Southwestern University undergraduate students is 0.90. Which of the following conclusions would be reasonable? Explain your answer. a. Sally is a Southwestern University undergraduate student, so 10% of her height is determined by nongenetic factors. b. Ninety percent of variation in height among all undergraduate students in the United States is due to genetic differences. c. Ninety percent of the height of Southwestern University undergraduate students is determined by genes. d. Ten percent of the variation in height among Southwestern University undergraduate students is determined by variation in nongenetic factors. e. Because the heritability of height among Southwestern University students is so high, any change in the students’ environment will have minimal effect on their height.

Answer 2

Textbook Question

Chapter 19, Problem 1P

Which of the following traits would you expect to be inherited as quantitative traits?

a. body weight in chickens

b. growth rate in sheep

c. milk production in cattle

d. fruit weight in tomatoes

e. coat color in dogs

Expert Solution & Answer

Summary Introduction

To analyze:

Determine the expected quantitative traits from the following:

Body weight in chicken

Growth rate in sheep

Milk production in cattle

Fruits weight in tomatoes

Coat color in dogs

Introduction:

Multifactorial traits are the results of genetic and non-genetic variation that can contribute to the variation in phenotypes of certain traits. These multifactorial traits can be classified as quantitative traits or qualitative traits. Qualitative phenotypic variations are discontinuous variation whereas quantitative phenotypic variations are continuous variation. The effect of multiple genes which exerts same or different amount of influence on the phenotypes leads to the continuous variation in the phenotypes of polygenic traits. The influence of multiple genes leads to a number of traits called polygenic traits. The incremental contributions by multiple genes result in continuous phenotypic variation. These multiple genes are called additive genes and their effects are called additive gene effects.

Explanation of Solution

The additive effects of multiple genes contribute to the body weight of the chicken. But chickens have different body mass which suggests that each gene contributes a certain quantity of body weight. This difference in body mass is responsible for continuous variation. Therefore, it is a quantitative trait.

Continuous variation is also seen in the growth rate of sheep. The additive effect of multiple genes is responsible for different growth rates. So, the growth rate in sheep is a quantitative trait.

The amount of milk produced by each cattle is varying continuously. This suggests that the phenotypic trait is controlled by a number of genes. Each gene may add a certain quantity of milk. Therefore, milk production in cattle is a quantitative trait.

Tomatoes are also have different weights. This difference in the weight of tomatoes is contributed by different genes. This suggests that continuous variation in weight difference is an additive gene effect. Therefore, fruit weight in tomatoes is a quantitative trait.

It is observed that the coat color of the dogs is not continuously varied. Contrast is present in the coat color of dogs. Therefore, coat color in dogs is not a quantitative trait.

Conclusion

The quantitative traits are classified based on continuous and discontinuous phenotypic variation.

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Answer 3

Textbook Question

Chapter 19, Problem 1P

Which of the following traits would you expect to be inherited as quantitative traits?

a. body weight in chickens

b. growth rate in sheep

c. milk production in cattle

d. fruit weight in tomatoes

e. coat color in dogs

Expert Solution & Answer

Summary Introduction

To analyze:

Determine the expected quantitative traits from the following:

Body weight in chicken

Growth rate in sheep

Milk production in cattle

Fruits weight in tomatoes

Coat color in dogs

Introduction:

Multifactorial traits are the results of genetic and non-genetic variation that can contribute to the variation in phenotypes of certain traits. These multifactorial traits can be classified as quantitative traits or qualitative traits. Qualitative phenotypic variations are discontinuous variation whereas quantitative phenotypic variations are continuous variation. The effect of multiple genes which exerts same or different amount of influence on the phenotypes leads to the continuous variation in the phenotypes of polygenic traits. The influence of multiple genes leads to a number of traits called polygenic traits. The incremental contributions by multiple genes result in continuous phenotypic variation. These multiple genes are called additive genes and their effects are called additive gene effects.

Explanation of Solution

The additive effects of multiple genes contribute to the body weight of the chicken. But chickens have different body mass which suggests that each gene contributes a certain quantity of body weight. This difference in body mass is responsible for continuous variation. Therefore, it is a quantitative trait.

Continuous variation is also seen in the growth rate of sheep. The additive effect of multiple genes is responsible for different growth rates. So, the growth rate in sheep is a quantitative trait.

The amount of milk produced by each cattle is varying continuously. This suggests that the phenotypic trait is controlled by a number of genes. Each gene may add a certain quantity of milk. Therefore, milk production in cattle is a quantitative trait.

Tomatoes are also have different weights. This difference in the weight of tomatoes is contributed by different genes. This suggests that continuous variation in weight difference is an additive gene effect. Therefore, fruit weight in tomatoes is a quantitative trait.

It is observed that the coat color of the dogs is not continuously varied. Contrast is present in the coat color of dogs. Therefore, coat color in dogs is not a quantitative trait.

Conclusion

The quantitative traits are classified based on continuous and discontinuous phenotypic variation.

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04:20

Answer 4

Textbook Question

Chapter 19, Problem 1P

Which of the following traits would you expect to be inherited as quantitative traits?

a. body weight in chickens

b. growth rate in sheep

c. milk production in cattle

d. fruit weight in tomatoes

e. coat color in dogs

Expert Solution & Answer

Summary Introduction

To analyze:

Determine the expected quantitative traits from the following:

Body weight in chicken

Growth rate in sheep

Milk production in cattle

Fruits weight in tomatoes

Coat color in dogs

Introduction:

Multifactorial traits are the results of genetic and non-genetic variation that can contribute to the variation in phenotypes of certain traits. These multifactorial traits can be classified as quantitative traits or qualitative traits. Qualitative phenotypic variations are discontinuous variation whereas quantitative phenotypic variations are continuous variation. The effect of multiple genes which exerts same or different amount of influence on the phenotypes leads to the continuous variation in the phenotypes of polygenic traits. The influence of multiple genes leads to a number of traits called polygenic traits. The incremental contributions by multiple genes result in continuous phenotypic variation. These multiple genes are called additive genes and their effects are called additive gene effects.

Explanation of Solution

The additive effects of multiple genes contribute to the body weight of the chicken. But chickens have different body mass which suggests that each gene contributes a certain quantity of body weight. This difference in body mass is responsible for continuous variation. Therefore, it is a quantitative trait.

Continuous variation is also seen in the growth rate of sheep. The additive effect of multiple genes is responsible for different growth rates. So, the growth rate in sheep is a quantitative trait.

The amount of milk produced by each cattle is varying continuously. This suggests that the phenotypic trait is controlled by a number of genes. Each gene may add a certain quantity of milk. Therefore, milk production in cattle is a quantitative trait.

Tomatoes are also have different weights. This difference in the weight of tomatoes is contributed by different genes. This suggests that continuous variation in weight difference is an additive gene effect. Therefore, fruit weight in tomatoes is a quantitative trait.

It is observed that the coat color of the dogs is not continuously varied. Contrast is present in the coat color of dogs. Therefore, coat color in dogs is not a quantitative trait.

Conclusion

The quantitative traits are classified based on continuous and discontinuous phenotypic variation.

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Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

To analyze:

Determine the expected quantitative traits from the following:

Body weight in chicken

Growth rate in sheep

Milk production in cattle

Fruits weight in tomatoes

Coat color in dogs

Introduction:

Multifactorial traits are the results of genetic and non-genetic variation that can contribute to the variation in phenotypes of certain traits. These multifactorial traits can be classified as quantitative traits or qualitative traits. Qualitative phenotypic variations are discontinuous variation whereas quantitative phenotypic variations are continuous variation. The effect of multiple genes which exerts same or different amount of influence on the phenotypes leads to the continuous variation in the phenotypes of polygenic traits. The influence of multiple genes leads to a number of traits called polygenic traits. The incremental contributions by multiple genes result in continuous phenotypic variation. These multiple genes are called additive genes and their effects are called additive gene effects.

Explanation of Solution

The additive effects of multiple genes contribute to the body weight of the chicken. But chickens have different body mass which suggests that each gene contributes a certain quantity of body weight. This difference in body mass is responsible for continuous variation. Therefore, it is a quantitative trait.

Continuous variation is also seen in the growth rate of sheep. The additive effect of multiple genes is responsible for different growth rates. So, the growth rate in sheep is a quantitative trait.

The amount of milk produced by each cattle is varying continuously. This suggests that the phenotypic trait is controlled by a number of genes. Each gene may add a certain quantity of milk. Therefore, milk production in cattle is a quantitative trait.

Tomatoes are also have different weights. This difference in the weight of tomatoes is contributed by different genes. This suggests that continuous variation in weight difference is an additive gene effect. Therefore, fruit weight in tomatoes is a quantitative trait.

It is observed that the coat color of the dogs is not continuously varied. Contrast is present in the coat color of dogs. Therefore, coat color in dogs is not a quantitative trait.

Conclusion

The quantitative traits are classified based on continuous and discontinuous phenotypic variation.

Answer 8

Expert Solution & Answer

Summary Introduction

To analyze:

Determine the expected quantitative traits from the following:

Body weight in chicken

Growth rate in sheep

Milk production in cattle

Fruits weight in tomatoes

Coat color in dogs

Introduction:

Multifactorial traits are the results of genetic and non-genetic variation that can contribute to the variation in phenotypes of certain traits. These multifactorial traits can be classified as quantitative traits or qualitative traits. Qualitative phenotypic variations are discontinuous variation whereas quantitative phenotypic variations are continuous variation. The effect of multiple genes which exerts same or different amount of influence on the phenotypes leads to the continuous variation in the phenotypes of polygenic traits. The influence of multiple genes leads to a number of traits called polygenic traits. The incremental contributions by multiple genes result in continuous phenotypic variation. These multiple genes are called additive genes and their effects are called additive gene effects.

Explanation of Solution

The additive effects of multiple genes contribute to the body weight of the chicken. But chickens have different body mass which suggests that each gene contributes a certain quantity of body weight. This difference in body mass is responsible for continuous variation. Therefore, it is a quantitative trait.

Continuous variation is also seen in the growth rate of sheep. The additive effect of multiple genes is responsible for different growth rates. So, the growth rate in sheep is a quantitative trait.

The amount of milk produced by each cattle is varying continuously. This suggests that the phenotypic trait is controlled by a number of genes. Each gene may add a certain quantity of milk. Therefore, milk production in cattle is a quantitative trait.

Tomatoes are also have different weights. This difference in the weight of tomatoes is contributed by different genes. This suggests that continuous variation in weight difference is an additive gene effect. Therefore, fruit weight in tomatoes is a quantitative trait.

It is observed that the coat color of the dogs is not continuously varied. Contrast is present in the coat color of dogs. Therefore, coat color in dogs is not a quantitative trait.

Conclusion

The quantitative traits are classified based on continuous and discontinuous phenotypic variation.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

To analyze:

Determine the expected quantitative traits from the following:

Body weight in chicken

Growth rate in sheep

Milk production in cattle

Fruits weight in tomatoes

Coat color in dogs

Introduction:

Multifactorial traits are the results of genetic and non-genetic variation that can contribute to the variation in phenotypes of certain traits. These multifactorial traits can be classified as quantitative traits or qualitative traits. Qualitative phenotypic variations are discontinuous variation whereas quantitative phenotypic variations are continuous variation. The effect of multiple genes which exerts same or different amount of influence on the phenotypes leads to the continuous variation in the phenotypes of polygenic traits. The influence of multiple genes leads to a number of traits called polygenic traits. The incremental contributions by multiple genes result in continuous phenotypic variation. These multiple genes are called additive genes and their effects are called additive gene effects.

Answer 12

Explanation of Solution

The additive effects of multiple genes contribute to the body weight of the chicken. But chickens have different body mass which suggests that each gene contributes a certain quantity of body weight. This difference in body mass is responsible for continuous variation. Therefore, it is a quantitative trait.

Continuous variation is also seen in the growth rate of sheep. The additive effect of multiple genes is responsible for different growth rates. So, the growth rate in sheep is a quantitative trait.

The amount of milk produced by each cattle is varying continuously. This suggests that the phenotypic trait is controlled by a number of genes. Each gene may add a certain quantity of milk. Therefore, milk production in cattle is a quantitative trait.

Tomatoes are also have different weights. This difference in the weight of tomatoes is contributed by different genes. This suggests that continuous variation in weight difference is an additive gene effect. Therefore, fruit weight in tomatoes is a quantitative trait.

It is observed that the coat color of the dogs is not continuously varied. Contrast is present in the coat color of dogs. Therefore, coat color in dogs is not a quantitative trait.